Ionthrusters are nowadays routinely used onsatellites for attitude control and fordedicated space missions, such as GOCE andDawn. The commonly used propellant for ionthrusters is the noble-gas xenon, whichcomprise some advantages such as highatomic mass, no chemical reactivity, andefficient ionization. One disadvantage ofxenon is the high price, which leads tohigh costs for testing and qualificationof thrusters. Potential candidates foralternative propellants are currentlyunder investigation in the electricpropulsion community.

Dr. Worden will talk about the Breakthrough Starshot challenge that aims to demonstrate a proof of concept for ultra-fast radiation-driven Nano- crafts, and lay the foundations for a first launch to Alpha Centauri within the next generation.